Larger Scale Impacts discussion, Wednesday 9 Jan. afternoon, 
Manchester ACTIVE/SCOUT/TWP-ICE Workshop

There was discussion on TTL exchange, particularly of moisture. 
 - Comparison of the three tropical campaigns show lowest values 
	over the Darwin area, why is unknown.
 - Questions of slow upwelling versus convective overshooting as primary 
	mechanism of the moisture and trace gas exchanges.
 - some possible paths forward include looking at back trajectories, 
	injection of ice crystals rather than vapor, look at vertical wind 
	shear, seek advice/collaboration with SPARC and TTL communities. 
- the good news is that the three tropical campaigns have produced data 
	sufficient to increase our understanding to the point that these more 
	detailed questions and issues can now be more informatively framed, 
	with some ideas how to proceed toward addressing them.


There was also discussion on the relationships of convection at various 
	scales (Hector, MCS, and typhoon scales) 
 - interactions between scales by various mechanisms, and how convection 
	organizes across these scales. One example is cold pool growth from 
	small to MCS systems.
 - it was noted that smaller scale convection is important for dynamics, yet GCM 
	scale models cannot resolve these scales.
 -  the "Year of Tropical Convection" activities were noted.
 - one of the main problems/limitations to further understanding is the lack of sonde 
	sites available in the region it is hoped that at least for YTC some means 
	of increasing sondes might be found.


In both cases (TTL exchange and convective scale interactions) it was recognized 
	that measurements alone cannot provide all the answers. Models on 
	various scales and with various resolutions are needed.
 - for example seasonal runs of mesoscale models can act as a bridge from smaller 
	to larger scales, both for convection and TTL/strat distributions of vapor and chemistry
 - satellite data, especially with the newer paltforms/measurements, will be very useful
 - smaller scale models get closer to the physics and less parameterizations, which 
	preclude investigations such as the details of TTL convective overshoot exchanges
 - global models are proceeding toward smaller scales, next generation at 50 km resolution? 
	These models will ideally require campaigns covering several grid boxes for 
	comparison/testing. Thus for the "next" experiments can we aim at providing these 
	type/scale/number of measurements/sites to meet the need when it arrives?